Die for making turn-buckles



(No Model.) 2 Sheets-Sheet 1.

S. A. CLARK. DIE FOR MAKING TURN BUOKLES.

No. 435,033 Patented Aug. 26, 1890.

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(N0 Model.) 2 Sheets-Sheet 2.

S. A. CLARK.

DIE FOR MAKING TURN BUOKLES.

No. 435,033. Patented Aug.26,189(0.

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UNITED STATES PATENT OFFICE.

STEPHEN A. CLARK, OF TERRE HAUTE, INDIANA.

DIE FOR MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 435,033, dated August 26, 1890. Application filed October 16, 1889. Serial No. 327,148. (No model.)

To all whom it may concern:

Be it known that I, STEPHEN A. CLARK, a

citizen of the United States, residingat Terre which the forging may be easily and conveniently manipulated and operated upon with the best results.

The invention consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings hereto annexed, Figure 1 is a perspective view of the lower or bottom die. Fig. 2 is a perspective view showing the top die in an inverted position. Fig. 3 is a vertical sectional view showing the dies placed together in position for operation. Fig. 4 is a perspective view of one of the levers and one of the'vertically-sliding pins detached f romthe die. Fig. 5 is aperspective view showing the blank from which the turn-buckle is manufactured. Fig. 6 is a transverse sectional View of the die with the blank in position after having been once operated upon and inverted. Fig. 7 is a perspective view showing one of the turn-buckles manufactured by means of my improved die.

Like numerals of reference indicate like parts in all the figures.

1 designates the lower or bottom die, which is provided in its upper side with an annular recess, which is of the outline or configuration which the turn-buckle or link is desired to have. The inner wall of said groove or recess is formed by a mandrel 2, the walls of which are beveled or inclined and which extends vertically above the face of the die 1, the upper edge of said mandrel forming a sharp ridge 3. The ends of the groove or recess 2 are enlarged, as shown at 4, to form the ends of the turn-buckle. Lugs or brackets 5 5 extendlaterally from the ends of the bottom die 1, and the said die is provided at its ends with recesses 6, communicating with vertical openings 7, extending downwardly from the enlarged ends 4 of the recess in the face of the die. In the vertical openings 7 are placed vertically-sliding pins 8, the lower ends of which are provided with slots 9 to receive the inner ends of levers 10, which are mounted pivotally in the recesses 6 of the die upon transverse pins 11. It will be seen that by operating the said levers the pins or furrowers 8 may be moved vertically in an upward or downward direction, as may be required. To the levers 10 are pivotally connected the caps 12, having downwardlyextending rods 13, which are guided in vertical perforations 14 in the lugs or brackets 5. Springs 15 are coiled around the rods 13 and press upwardly against the caps 12, thereby forcing the outer ends of the levers 10 in an upward direction, and consequently retaining the vertically-sliding pins or followers 8 normally in a lowered position.

16 designates the top die, which is provided in its face with a groove or recess 17 of the outline of the turn-buckle or link, which is to be constructed, but which is much shallower than the corresponding recess 2 in the face of the bottom die 1. The top die 16 is also provided in its face with a centrallylocated vertical recess 18, to receive the portion of the mandrel 3 which projects above the face of the bot-tom die 1.

The blank from which my improved turnbuckle or link is manufactured -is out from a bar of either round or square wrought-iron of suitable length, and is shown at 1.9 in the drawings. The said blank having been out of the proper size, is provided with a longitudinal slot 20, which may be formed in any suitable press or punching machine, and in the act of forming which the metal on each side of said slot is upset or forced in an upward direction, while the metal at the ends of the blank and at the ends of said slot remains undisturbed. While the upper die is in a raised position the blank 19 is arranged upon the upper end of the mandrel, which is beveled or wedge-shaped, as already described, so-that it will readily enter the slot 20. The top die is then forced downwardly by one or more blows of the hammer, thus forcing the blank which has been previously heated to the desired point in a downward direction and into the recess 2, which forms the die proper. The top die is now lifted, when by manipulating the levers the vertically-sliding pins or followers 8 will be forced in an upward direction, thus lifting the forging out of the die and enabling it to be grasped with the tongs and reversed. The top die is now again lowered and subjected to-one or more blows of the hammer, thus driving the forging back into the die and smoothing or shaping the burr 22, which has been left around its circumference owing to the unequal sizes of the recesses in the bottom and top dies and completing the forging. When the forging has been completed, the levers 10 may be again manipulated, so as to force-the link or turn-buckle in an upward direction and out of the die, from which it may then be removed in the usual manner with the tongs.

By my improved method of manufacturing turn-buckles and similar links the said links or buckles are made jointless or weldless and will therefore be found to be possessed of superior strength. The ends of the link, which in a turn-buckle should be much heavier than the remainder of the link, may readily be made so by properly regulating the length of the slot in the blank from which the device is formed. The method of manufacturing is very simple and may be easily carried into effect. WV'hen desired, one of the hand-levers 10 which is nearest to the operator maybe connected by pivoted rods 24 with a foot-lever 25, by means of which it may be conveniently operated,tl1e otherhandlever 10 being manipulated by the operators assistant.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

ner walls of which are formed by an upwardly-extending mandrel having inclined sides and a sharp upper edge, substantially,

as set forth.

2. A die for manufact-uringlinks or turn buckles, having an annular recess, a central upwardly-extending wedge-shaped mandrel, and vertically-sliding pins or followers, substantially as set forth.

3. In adie for manufacturing turn-buckles, the combination, with the bottom die having an annular groove or recess, of the verticallysliding pins or followers and the outwardlyextending levers for manipulating the same, substantially as set forth.

4. The bottom die having the annular recess and the centrally-located mandrel extending above the face of said die, in combination with the vertically-sliding pins or followers, the operating-levers, and springs arranged to force the outer ends of said levers in an upward direction, substantially as set forth.

5. In a die for manufacturing turn-buckles,

the combination, with the bottom die having an annular groove or recess and a centrallylocated wedge-shaped mandrel extending STEPHEN A. CLARK. Witnesses:

HARRY I-IARRELL, RICHARD DAHLEN. 

